Electric switch.



YP. DRUSEIDT. ELECTRIC SWITCH. APPLICATION FILED DEO. 30, 1911.

Patented Aug. 6, 1912.

which are uncoupled, from each otherl in the direction of movement of a press-button, before the switch 4 contacts in its rotation.

section on the line A-B a coupling nut. Fig.

v throughout the several views.

' 35 passes freely. The said l rotatably in a press-button 4 which 1s slld- 40 7 that covers 5 Germany, have PAUL DRUSEIDT, GF REIIIISCHEID, GERMANY.

ELECTRIC SWITCH.

X S'pecication of Letters Patent.

Applcat'ion'led December 30, 1911.

To all 'whom 'it may concern. 4

Be it known that I, PAUL DRSEIDT, ya subject of the Emperor of Germany, and resident of Elberfelderstrasse 27, Remscheid, invented certain new and' useful Improvements in Electric Switches, of whichthe following is a specification.

This invention has reference to an electric 'sw-itch, the contacts and switch body of or at leasltloosened,

body rotates or while it slides along the The invention is illustrated7 by way of example in the accompanying drawing, in which: Figure 1 shows the switch partly in section and partly "in elevation, Fig. v2 is a of Fig. 1, and Fig. 3 1s a section on the line C D of Fig. 2. Fig. 4 is a perspective view of a detail of a device, hereinafter termed a switch body. Fig. 5 is a view similar tov Fig. 4 showing 6 is a view similar to Fgilt showingV a press button and high "*pitchelscrew which coacts` with the element shown in detail in Figs. 4 and 5.

' Similar charactersreferto similar'parts The switch body 1 is formed or provided on its front face with a toothed coupling 2 having obliquelyl rising teeth bore through which a high-pitch screw 3 screw is fixed nonable axially, and guided so'that it cannot rotate, in the switch plate 5. The screw 3 as a bearing ina socket 6 formed in a cap the working parts 'of the switch at the back, which cap is advantageously connected to a switch plate 5 and contacts9 by means of the terminals '8. Against' the oblique faces of the teeth of the coupling 2,

5 acoupling nut 1 0, having like Vshaped teeth,

bears, which nut is rotatable `on the high pitch thread of the screw 3 and the vteeth of which nut engage the teeth of the coupling V2 under the action of a sprino4 11. A

5 0 stronger spring l2 passes the switch body Y with rearwardly projecting lugs 13 1 against the contacts 9 which are provided 'the switchkbody 1 is displaced lengthwise in the direction .of movement of' the pressbutton 4 when the said button with the screw 3 is pushed inwardly. In 'order to and a central althougigh thel switch body Patented Aug. 6, i912. Serial No. 668,604. v

I reduce the very short displacementrubbing between the switch -body l and the lugs 13, the latter may rise somewhat obliquely, as shown in Fig. 3, either the said surfaces, as shown in Fig. 3, the nut 10, coupling 2 and switch body l are rotated in the direction of the arrow as the screw 3 is pushed farther inward. of the lugs 13 being beveled, theswitch body may be formed with beveled contact sur-A lfaces. ,During the rotation of the switch body 1 on the beveled surfaces, which may of course be inclined at anydesired angle and of any desired length, the'switch body in its rotation is pushedl away from the contacts in the direction of lthe pressure, and

accordingly-the rubbing frictional contact is-entirely suspended, or atleast reduced' I by the loosening,l the already compressed spring 12 being at the same time put under further tension.' As 4Soon as the switch body .1 leaves the 'lugs 13 it is rotated under the strong action of the spring 12 with a sudden jerk in the direction of .thev arrow (Fig. 2) against the next lugsy13, z'. e. from 9, 9 to 91, 92, being turned with the coupling nut 10 around the high-pitch thread of the screw 3. During-this sudden rotation of the switch body 1,`the saidbody together withl the coupling 2 can overrun the coupling nut 10, and thus the important result is attained that the screw 3 may have 'a very feeble pitch and the couplings 2 or 10, or both, may be formed with more than four teeth of a revolution at Feach operation or one of them may have more thanl four teeth and the other only one tooth, the re-coupling in thatcasein the return of the screw 3 taking place earlier than a quarter revolution, soy

that the Vpress-button only requires tobe pushed in 'a few tenths tacts 9. A very short movement@ of the press-button, only from one to two milllmeters, suttices to actuate the swltch. 4When the press-button is released ythespring l 1l 1 rotates a quarterof a., millimeter" fary vther than the lugs 13 project from the con-- -13 only project a few tenths of a millimeswitches the latter may be 'of angular shape,

switch body, it will be understood that the -or reduction of the rubbing-of' the switchfof a rotatable switch body, a plurality of and nut in engagement, and a spring adaptushes it together with the screw 3 back into the normal position, the coupling nut 10 sliding back over the teeth of the coupling 2. l i L Always according to the arrangement of the lugs 13, the spring 12 effects exclusively the rotation of the nut 10 and the switch body coupled therewith, orthe rotation of the clatter is effected by the pushing in of the screw 3, for example if the lugs 1?, or the contacts 9 or the switch body 1 are provided with gradually rising inclined surfaces. f

The spring 12 Aeffects onlyl a very slight rotation of the nut-'10 and the switch body 1 coupled therewith if, for example, the lugs contacts adapted to be engaged by said switch body, a coupling member carried by said switch body, .a reciprocable but non- 'rotatable screw, a coupling nut carried by said screw adapted to coact with saidcou- -pling member of said switch body, a push button for operating said screw, a spring .interposed between saidbutton'and coupling nut to retain the latter in engagement with said coupling memberyand a second spring adapted to normally' retain said switchbody in engagement with said contacts. 3. In an electric switch, the combination of a rotatable switch body, a plurality of .contacts adapted Vto bewengaged bysaid said-switcli body, a reciprocable but "nonrotatablescrew, a coupling nut'carriedfby said screw adapted to coactvwith said-coupling member of saidfswitch-body, 'a push ter, or if the latter are dispensed with, in which event'the screw thread must be of suitable length and theicouplings 2 and 10 must also have a suitable number of teeth.

The switch body 1 is in the case of changeover or ordinary switches provided with wings as shown in Figs. 1 and 2; .forjseries interposedbetweenasaid button and coupling said coupling member, `and a second spring or therey may be a larger number of them, adapted to normally retain said.- switch body for eXarf-ple 3.

Instead of displacing or loosening the mentioned spring having greater tension than said first mentioned spring, substancontacts or the lugs may be displaced axtially as and forthe purpose set forth." ally; further, theflugs may also be mounted to project in the opposite direction on the switch body in order to effect in accordance with the invention theuncoupling, loosening of a reciprocatable screw, a switchbody vrevscrew and -switch body being movable axially one withv respectfto theother, a plurality of contacts disposed in the path of movement of said switch body and adapted 'to be successively engaged thereby,said contacts normally preventing rotation of said body land they contacts in the direction of movement of the pressed button.4

1. In` an electric switch, the combination switch body toward said contacts, and means actuated by said screw for successively actuating said switch body against action of said spring and rotating the same, substantially as and for the purpose set forth.

In testimony whereof, I have hereunto set my hand in presence of two witnesses.

'y PAUL nnusninr.-

contacts adapted to be engaged by said switch body, a coupling member earriedfby said switchbody, a reciprocable, but nonrotatable, screw, a coupling nut carried by said screw adapted to coact with said coupliug member of said switch body, a push utton for operating said screw, means for normally retaining said coupling member 7Witnesses:

WOLDEMAR HAUPT, HENRY Hasrnav ed to normally retainsaid switch body in engagement with said contacts. y

2. In an electric switch, the combination` Copies of this patent may be obtained for five cents each, by addressing the Commissioner-ef' Tatents, v Washington, D. C.

of a rotatable switch body, a plurality ofL switch body, a coupling-member carried-by button for operating saidfscrew, la spring c,

nut to retain the latter in engagementwith,

in engagement with said contact, said second 4. In an electric switch, the combination oluble about the axis of said., screw, said,

lswitch body, a spring normally forcing said 

